[PATCH v3] dt-bindings: mtd: microchip,mchp23k256: convert to DT schema

[PATCH v3] dt-bindings: mtd: microchip,mchp23k256: convert to DT schema

[Akhila YS]

Convert Microchip 23K256 SPI SRAM MTD binding to YAML format.
Changes during conversion:
- Remove "address-cells" and "size-cells" from properties and
  required sections as there is no child node for sram.

Signed-off-by: Akhila YS <akhilayalmati@gmail.com>
---
Changes in v3:
- Changed commit description to document changes during yaml conversion.
- Corrected indentation for example.
- Link to v2: https://lore.kernel.org/r/20260102-nxp-v2-1-05f5dd947459@gmail.com

Changes in v2:
- Removed "#address-cells" and "#size-cells" from the required, properties
  and example. 
- Changed description and title for yaml.
- Link to v1: https://lore.kernel.org/r/20251229-nxp-v1-1-a415fe0080a8@gmail.com
---
 .../bindings/mtd/microchip,mchp23k256.txt          | 18 --------
 .../bindings/mtd/microchip,mchp23k256.yaml         | 49 ++++++++++++++++++++++
 2 files changed, 49 insertions(+), 18 deletions(-)

diff --git a/Documentation/devicetree/bindings/mtd/microchip,mchp23k256.txt b/Documentation/devicetree/bindings/mtd/microchip,mchp23k256.txt
deleted file mode 100644
index 7328eb92a03c..000000000000
--- a/Documentation/devicetree/bindings/mtd/microchip,mchp23k256.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-* MTD SPI driver for Microchip 23K256 (and similar) serial SRAM
-
-Required properties:
-- #address-cells, #size-cells : Must be present if the device has sub-nodes
-  representing partitions.
-- compatible : Must be one of "microchip,mchp23k256" or "microchip,mchp23lcv1024"
-- reg : Chip-Select number
-- spi-max-frequency : Maximum frequency of the SPI bus the chip can operate at
-
-Example:
-
-	spi-sram@0 {
-		#address-cells = <1>;
-		#size-cells = <1>;
-		compatible = "microchip,mchp23k256";
-		reg = <0>;
-		spi-max-frequency = <20000000>;
-	};
diff --git a/Documentation/devicetree/bindings/mtd/microchip,mchp23k256.yaml b/Documentation/devicetree/bindings/mtd/microchip,mchp23k256.yaml
new file mode 100644
index 000000000000..32e9124594ac
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/microchip,mchp23k256.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/microchip,mchp23k256.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip 23K256 SPI SRAM
+
+maintainers:
+  - Richard Weinberger <richard@nod.at>
+
+description:
+  The Microchip 23K256 is a 256 Kbit (32 Kbyte) serial SRAM with an
+  SPI interface,supporting clock frequencies up to 20 MHz. It features
+  a 32-byte page size for writes and supports byte, page, and
+  sequential access modes.
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    enum:
+      - microchip,mchp23k256
+      - microchip,mchp23lcv1024
+
+  reg:
+    maxItems: 1
+
+required:
+  - reg
+  - compatible
+  - spi-max-frequency
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        sram@0 {
+            compatible = "microchip,mchp23k256";
+            reg = <0>;
+            spi-max-frequency = <20000000>;
+        };
+    };
+...

---
base-commit: cc3aa43b44bdb43dfbac0fcb51c56594a11338a8
change-id: 20251229-nxp-526e29da9f29

Best regards,
-- 
Akhila YS <akhilayalmati@gmail.com>


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Re: [PATCH v3] dt-bindings: mtd: microchip,mchp23k256: convert to DT schema

[Krzysztof Kozlowski]

On Mon, Jan 05, 2026 at 03:08:00PM +0000, Akhila YS wrote:
> Convert Microchip 23K256 SPI SRAM MTD binding to YAML format.
> Changes during conversion:
> - Remove "address-cells" and "size-cells" from properties and
>   required sections as there is no child node for sram.

I looked at the driver and clearly see usage of partitions from DT, thus
the binding needed both above and the partitions coming from MTD schema,
so this is not really correct. Looks like you did not really try to
understand this binding and the driver.

Converting bindings is not trivial task and you must really understand
also what was incomplete in the binding.

Anyway, I don't want to deal with this more, so:

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Best regards,
Krzysztof


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Re: [PATCH v3] dt-bindings: mtd: microchip,mchp23k256: convert to DT schema

[Miquel Raynal]

On Mon, 05 Jan 2026 15:08:00 +0000, Akhila YS wrote:
> Convert Microchip 23K256 SPI SRAM MTD binding to YAML format.
> Changes during conversion:
> - Remove "address-cells" and "size-cells" from properties and
>   required sections as there is no child node for sram.
> 
> 

Applied to mtd/next, thanks!

[1/1] dt-bindings: mtd: microchip,mchp23k256: convert to DT schema
      commit: 2372fe1ceaf5a1e681c81f3dc35eb7f954526cbd

Patche(s) should be available on mtd/linux.git and will be
part of the next PR (provided that no robot complains by then).

Kind regards,
Miquèl


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